A Comprehensive Study of Deep Catalytic Oxidation of Benzene, Toluene, Ethyl Acetate, and their Mixtures over Pd/ZSM-5 Catalyst: Mutual Effects and Kinetics

Abstract

Reaction behaviors and kinetics of catalytic oxidation of benzene, toluene, and ethyl acetate with feed concentrations in the range of 700-5,000 ppm over Pd/ZSM-5 catalyst were investigated. Results for single components show that ethyl acetate (T 50 =190-200°C) is more easily oxidized than benzene (T 50 =215-225°C) and toluene (T 50 =225-235°C). The conversion of ethyl acetate was increased with the increase of its feeding concentration, while the opposite behaviors were observed for benzene and toluene as their conversion rates were decreased with the increase of the inlet concentration. Different behaviors were observed in catalytic oxidation of volatile organic compound (VOC) multi-components, the presence of benzene or toluene inhibits the conversion of ethyl acetate, and the aromatic hydrocarbons inhibit each other in all cases. Ethyl acetate possesses obvious inhibitory effect on benzene oxidation, while it is interesting to note that ethyl acetate has a promotion effect on toluene conversion. The kinetic data were fitted by the Power-law and Mars-van Krevelen kinetic models. The fitting result shows that the Power-law model is more suitable for predicting the conversion of benzene than the other VOCs, and the Mars-van Krevelen model can accurately express the reaction rate of all investigated VOCs.

Catalytic behavior and synergistic effect of nanostructured mesoporous CuO-MnOx-CeO2 catalysts for chlorobenzene destruction

“…Similarly, the positive influences of trichloroethylene inlet concentration on its catalytic combustion over CeO 2 and Pt-based catalysts were also found by Core et al and Dai et al [9,46]. Besides, the promotion effect of inlet ethyl acetate concentration on its catalytic destruction was also reported in our previous work [47]. • C. (Cc, SCO 2 , and C bp stand for the chlorobenzene conversion, CO2 selectivity, and byproduct aldehyde concentration, respectively.…”

Templated Silica with Increased Surface Area and Expanded Microporosity: Synthesis, Characterization, and Catalytic Application

“…Stringent environmental regulations have been developed and implemented to reduce the VOCs emission [18]. Among all VOCs, BTX (benzene, toluene and xylene) are of particular concern due to their high toxicity for human beings [19][20][21]. Currently, VOCs catalytic oxidation has been widely investigated over different types of catalysts such as supported noble metals, metal oxides, and mixtures of noble metals and metal oxides [22,23].…”

Methane–benzene binary mixture destruction in a reverse flow catalytic reactor

“…In these situations, the catalytic oxidation process becomes complicated due to the so-called mixed effect. He [14] investigated the mutual inhibition effect between benzene and ethyl acetate, and similar effects are reported elsewhere [15][16][17]. Thus, co-combustion of different kinds of hydrocarbons with remarkable discrepancy in chemical properties and the mutual inhibition effect on RFR behavior are worth consideration.…”